<template>
    <div>
         <!-- 面包屑 -->
        <el-breadcrumb separator="/">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <el-card>
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addDialogVisible=true">添加角色</el-button>
                </el-col>
            </el-row>


            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
            <el-table-column type="expand">
                <template slot-scope="scope">
                    <el-row  :class="['bdbottom',i1 ===0 ?'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                        <!-- 渲染一级权限  span一行一共24  一级占五列-->
                        <el-col :span="5">
                        <el-tag closable @close="removeRightById(scope.row,item1.id)">
                            {{item1.authName}}
                        </el-tag>
                        <i class="el-icon-caret-right"></i></el-col>
                        
                        <!-- 渲染二三级权限 -->
                        <el-col :span="19">
                        <el-row  :class="[i2,i3 === 0 ? '':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id"> 
                            <!-- 通过循环嵌套渲染二级权限 -->
                            <el-col :span="6">
                                <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">
                                    {{item2.authName}}
                                </el-tag><i class="el-icon-caret-right"></i>
                                
                            </el-col>
                            <el-col :span="18">
                             <el-tag  type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                                    {{item3.authName}}
                             </el-tag>
                            
                            </el-col>
                        </el-row>
                        </el-col>
                    </el-row>
                </template>
            </el-table-column>
            <el-table-column type="index" label="序号"></el-table-column>
            <el-table-column  label="角色名称" prop="roleName"></el-table-column>
            <el-table-column  label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column  label="操作" width="300px">
                <template slot-scope="scope">
                    <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
                    <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRolesById(scope.row.id)">删除</el-button>
                    <el-button size="mini" type="warning" icon="el-icon-setting" 
                    @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>
            </el-table>
        </el-card>

        <!-- 添加角色提示对话框 -->
            <el-dialog title="添加角色"  :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
            <!-- 内容主体区域 -->
           <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
            <el-form-item label="角色名" prop="roleName" label-width="90px">
                <el-input v-model="addForm.roleName"></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc" label-width="90px">
                <el-input v-model="addForm.roleDesc"></el-input>
            </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible= false">取 消</el-button>
                <el-button type="primary" @click="addRoles">确 定</el-button>
            </span>
            </el-dialog>
 

 <!-- 修改用户对话框 -->
            <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
            
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
            <el-form-item label="角色名" prop="roleName" label-width="90px">
                <el-input v-model="editForm.roleName" ></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc" label-width="90px">
                <el-input v-model="editForm.roleDesc" ></el-input>
            </el-form-item>
            </el-form>

            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRolesInfo">确 定</el-button>
            </span>
            </el-dialog>


            <!-- 分配权限对话框 -->
            <el-dialog title="分配权限"  :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
            <!-- 树形区域 -->
                <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" 
                default-expand-all def :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible= false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
            </el-dialog>

    </div>   
</template>

<script>
export default{
    data(){
        return{
            // 控制分配权限对话框的显示与隐藏
            setRightDialogVisible:false,
            // 所有权限的数据
            rightslist:[],
            // 树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            // 默认选中的节点id值数组
            defKeys:[],
            roleId:'',
            addDialogVisible:false,
            // 所有角色列表数据
            rolelist:[],
            // 添加角色的表单数据
            addForm:{
                roleName:'',
                roleDesc:''
            },
            // 添加表单验证规则对象
            addFormRules:{
                roleName:[{
                    // 必填项验证规则
                        required:true,
                        message:'请输入角色名',
                        trigger:'blur'
                }],
                roleDesc:[{
                    // 必填项验证规则
                        required:true,
                        message:'请输入角色描述',
                        trigger:'blur'
                }]
            },
            editDialogVisible:false,
            editForm:{},
            editFormRules:{
                roleName:[
                    {
                        required:true,
                        message:'请输入角色名',
                        trigger:'blur'
                    }
                ],
                roleDesc:[
                    {
                        required:true,
                        message:'请输入角色描述',
                        trigger:'blur'
                    }
                ],
            }
        }
    },
    created(){
        this.getRoleList()
    },
    methods:{
        async getRoleList(){
            const {data:res}=await this.$http.get('roles')
            if(res.meta.status !==200){
                return this.$message.error('角色列表获取失败')
            }
            this.rolelist = res.data
            console.log(this.rolelist);
        },
        addDialogClosed(){
            this.$refs.addFormRef.resetFields()
        },
        addRoles(){
            this.$refs.addFormRef.validate( async valid =>{
                if (!valid)return
                // 可以发起添加用户的网络请求
                const{data:res} = await this.$http.post('roles',this.addForm)
                if(res.meta.status !==201){
                    this.$message.error('添加角色失败')
                }
                    this.$message.success('添加角色成功')
                    // 隐藏添加用户的对话框
                    this.addDialogVisible = false
                    // 重新获取用户列表数据
                    this.getRoleList()
            })
        },

        async showEditDialog(roleId){
            const{data:res} = await this.$http.get('roles/'+roleId)
            if(res.meta.status !==200){
                return this.$message.error('查询用户信息失败')
            }
            this.editForm = res.data
            this.editDialogVisible = true
        },
        editDialogClosed(){
            this.$refs.editFormRef.resetFields()
        },
        // 修改用户信息并提交
        async editRolesInfo(){
            this.$refs.editFormRef.validate( async valid=>{
                if(!valid)return 
                const{data:res} = await this.$http.put('roles/'+this.editForm.roleId,{
                    roleName:this.editForm.roleName,
                    roleDesc:this.editForm.roleDesc})
                if(res.meta.status !==200){
                    return this.$message.error('修改用户信息失败')
                }
                    this.$message.success('修改用户信息成功')
                    // 隐藏添加用户的对话框
                    this.editDialogVisible = false
                    // 重新获取用户列表数据
                    this.getRoleList()
            })
        },


        async removeRolesById(roleId){
            const confirmResult =  await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
        }).catch(err=>err)
        console.log(confirmResult);
        if(confirmResult !='confirm'){
            return this.$message.info('已取消删除')
        }
        const {data:res} = await this.$http.delete('roles/'+roleId)
        if(res.meta.status !==200){
            return this.$message.error('删除用户失败')
        }
        this.$message.success('删除用户成功')
        this.getRoleList()
        },
        // 删除权限
        async removeRightById(role,rightId){
            const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
        }).catch(err=>err)
        if(confirmResult !='confirm'){
            return this.$message.info('已取消删除')
        }
        const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if(res.meta.status !==200){
            return this.$message.error('删除权限失败')
        }
        this.$message.success('删除权限成功')
        role.children = res.data
        },
        // 分配权限
        async showSetRightDialog(role){
            this.roleId = role.id
            // 获取所有权限数据
            const{data:res} = await this.$http.get('rights/tree')
            if(res.meta.status !==200){
                return this.$message.error('获取权限数据失败')
            }
            // 把获取到的权限数据保存到data中
            this.rightslist = res.data
            console.log(this.rightslist);
            this.setRightDialogVisible= true

            // 递归获取三级节点的id
            this.getLeafKeys(role,this.defKeys)
        },
        // 通过递归的形式，获取角色下所有三级权限，并保存到defkeys中
        getLeafKeys(node,arr){
            // 如果当前node节点不包含children 则是三级节点
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item=>
            this.getLeafKeys(item,arr))
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys = []
        },
        // 点击为角色分配权限
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()

            ]
            const idStr = keys.join(',')


           const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
           if(res.meta.status !==200){
            return this.$message.error('分配权限失败')
           }
           this.$message.success('分配权限成功')
           this.getRoleList()
           this.setRightDialogVisible = false
        }
        
        }}
</script>
<style lang="less" scoped>
    .el-tag{
        margin: 7px;
    }
    .bdtop{
        border-top: 1px solid #eee;
    }
    .bdbottom{
        border-bottom: 1px solid #eee;
    }
    .vcenter{
        display: flex;
        align-items: center;
    }
</style>